MIDDLESEX COUNTY — South River and Woodbridge are among eight school districts where residents will vote on referendums Tuesday, with a total of more than $194 million in school construction projects statewide coming up for question.

Of the total amount being requested, about $51 million is eligible to be paid by state funding, according to the New Jersey School Boards Association.

In South River, residents will vote on more than $14 million in improvements to the high school and primary school. The bulk of the proposed work would be at the high school, where Acting Superintendent and High School Principal Kevin Kidney said major infrastructure improvements to the building’s windows, heating, air-conditioning and electric system are long overdue.

The state would foot 51 percent of the bill, and residents would pay the rest. If approved, a resident living in the average assessed home of about $83,000 would see an annual tax increase between $70 and $107.

Woodbridge, meanwhile, is asking for approval of $32.5 million to install roofs with solar panels at its schools, cutting energy costs for the district by $1.3 million. A resident in the average assessed home of about $75,000, currently paying about $6,600 in taxes, would see an annual increase of less than $7.

Voting is from 1 to 9 p.m. in South River and 2 to 9 p.m in Woodbridge.